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Date: Wed, 20 Jun 2018 15:35:10 -0700
From: Kees Cook <>
To: Randy Dunlap <>
Cc: Rick Edgecombe <>, Thomas Gleixner <>, 
	Ingo Molnar <>, "H. Peter Anvin" <>, X86 ML <>, 
	LKML <>, Linux-MM <>, 
	Kernel Hardening <>, 
	kristen Accardi <>, Dave Hansen <>, 
	"Van De Ven, Arjan" <>
Subject: Re: [PATCH 1/3] vmalloc: Add __vmalloc_node_try_addr function

On Wed, Jun 20, 2018 at 3:16 PM, Randy Dunlap <> wrote:
> On 06/20/2018 03:09 PM, Rick Edgecombe wrote:
>> +void *__vmalloc_node_try_addr(unsigned long addr, unsigned long size,
>> +                     gfp_t gfp_mask, pgprot_t prot, unsigned long vm_flags,
>> +                     int node, const void *caller)
>> +{
> so this isn't optional, eh?  You are going to force it on people because?

RANDOMIZE_BASE isn't optional either. :) This improves the module
address entropy with (what seems to be) no down-side, so yeah, I think
it should be non-optional. :)


Kees Cook
Pixel Security

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